My sunburst epiphone thunderbird IV has had its two rear screws pop out of their foundations

. Any advice as to what do to will be appreciated for the repairs people near where I live (Townsville, Australia) seemingly cant wait to rip me off. I bought my t-bird while in NYC for US$300 from GC, over here its sticker price is AU$1000, awesome.
Btw I'm only 15 so if u think i shouldnt be gunnin for diy on this job do tell.